SYNTAX

A PUBLICATION OF THE HARVARD

VOL. 5 NO.IO

ISSN 0273-2696

OCT. 1984

IN THIS ISSUE

SINCLAIR CONSIDERS SELLING SPECTRUM+ IN

US

8K Programs

Towers of Hanoi . 12

TS2068 Programs Towers of Hanoi . 12

Book Reviews Practical Guide to Machine Language Programming on the

Timex/Sinclair . 8

Key Finder Card . 10

Classified Ads . 20

News . 1

New Products and Services . 2

RAND USR 8 39/7 . 2

Software Articles 2068 ROM Atlas Spectrum to

TS2 068 . 3

VAL$ on 2 06 8 . 10

Syntax Errors . 2

Index of Advertisers

TS Horizons . 14

The Harvard Group/Syntax

Books . 13

Connector . 8

DeadSoft tm . 19

Mindware . 4,8,15

Sinclair . 10

Sof tSync . 6,13,17

UK sales of the Spectrum with a QL keyboard, began upon its announcement. According to Nigel Searle, Managing Director, ZX Spectrum+ "consolidates & enhances our long-established position as market leader in the UK, where over 1 million Spectrums have been sold.

With significant production volumes available immediately, this new computer will make a major impact world-wide in the 1984 Christmas market and beyond."

Spectrum-r offers full compatibility with existing Spectrum software and peripherals. Seventeen additional keys plus a space bar let many operations be performed with a single keystroke. Besides the real keyboard. You also get a reset button to clear the computer without unplugging the power.

With the ZX Expansion System, you end up with a microdrive, RS-232, and LAN.

Sinclair informs SYNTAX that they are considering selling Spectrum+ in the US. UK pricing is L180 with Tasword 2, VU-3D and four games. Interface I comes with 4 Micro¬ drive cartridges containing a database manager, utilities and other programs at a cost of £99 in the UK.

To encourage Sinclair to sell this machine here, write to Sinclair Research, Ltd., 50 Staniford St. Boston, MA 02114.

SINCLAIR DEVELOPS 1-MBYTE MEMORY WAFER

According to reports in EE Times, Sinclair Radionics has developed wafer-scale, serial- access memory with battery backup using a 12- year-old technique to connect low-power NMOS dynamic RAM cells in a redundant logic struc¬ ture. Sinclair Radionics plans to bring these to market during 1985. Plans call for a 4-in square, 1-in thick, 1 Megabyte memory with battery backup. EE Times suggests that the price could be as low as $25 0 — competing strongly with conventional disks.

1

SYNTAX ERRORS: RAND USR 8 39 will not function as we said. To LOAD without autorun, select FAST mode and use RAND USR 837 instead. LOADing stops with report C/0 and you then LIST or SAVE the program. Thanks to H. K. Olsen of Prince George, BC for the correct method.

NEW PRODUCTS AND SERVICES

$CRYPTIC GOLD$ combines a 2K BASIC program, a gameboard, answer data, a program listing and a tape on which to save your program. This trivia game generates the next question from the correct answer to the previous one — but wrong answers garble the following question. Tex Micro plans tournaments with cash prizes around major holidays, with "GO" codes published in a national daily newspaper. Between contests, use the question generator to make your own puzzles. About $30, from Tex Micro Inc. 3700 S. Hopkins, Titusville FL 32780. 305/631-1715.

Want to understand the Fifth Gener¬ ation babble you hear in computer circles? Looking for a layman's introduction to Artificial Intell¬ igence? Could PROLOG be someone's epilogue? Try THE FIFTH GENERATION Artificial Intelligence and Japan' s Computer Challenge to the World. ISBN 0-451-13153-3 $3.95 US $4.95 in Canada.

ZX-CALC accounting model comprises a set of templates to prepare ten fundamental financial reports for sole proprietorships. Available on ZX-CALC cassette with built-in templates for $19.95, or a printout from which you enter the templates to your copy of ZX-CALC and save the resulting program — $8.00. Add $1.50 S&H per item. Use with ZX/TS with 32K RAM. From AFR Software, 1605 Pennsylvania Av, #204, Miami Beach, FL 33139 305/531-6464

Budget Robotics & Computing purchased the rights to make and

sell the Computer Continuum Buffered Buss Development Board. Bare board with documentation and parts list, $40 PPD. Works with all ZX/TS including ZX80.

RX81 boards also available for use with Buffered Buss Board or to plug direct to ZX/TS or 2068. Get 8 I/O's per board, can use several Bare board plus documentation: $10 PPD. Budget Robotics & Computing, Box 18616, Tucson, AZ 85731.

Graphics Tablet for 2068 consists of a tablet by Koala Technologies, ZebraPainter Cassette software, and the Zebra Graphics Interface. Lets you draw hi-res pictures into your 2068 in extended color mode. All hardware and software plus manual $119.95 From Zebra Systems, Inc., 78-06 Jamaica Av., Woodhaven, NY 11421 718/296-2385.

Centronics cable with 16K printer buffer for only $119.95 plugs between printer and interface to give the effect of a very high¬ speed printer. Digital Devices Corp., 4 30 Tenth St., Suite N2 05 , Atlanta, GA 30318. 800/554-4898

(in GA, 4 04/872-4430)

Writer's Digest Books offers its new edition — 1985 Programmer's Mar¬ ket — edited by Brad McGehee. We checked, and find 17 listings for Timex-Sinclair software markets.

If you also write for some other machines, you'll find a total of 700 markets here, plus articles and guides to the freelance business. $16.95 + $1.50 S&H. Writer's Digest 9933 Alliance Rd, Cincinnati, OH 45242. CC orders call 800/543-4644

Monitor tuners let you use TV signals on your monitor. Connect several computers on different channels to a single monitor, or take a break and watch the news. Model MT/1 offers 60 channels with remote control ($200) while model MT/2 tunes manually on all VHF/UHF channels ($100). Available in many

2

computer stores. Illustrated literature from CARDCO, INC., 300 S. Topeka, Wichita, KS 67202.

Oddball Software tm Magazine will publish programs of use to limited audiences. It solicits submissions of software for any computer, and subscriptions. MC/VISA $15/6 iss. Meninges Publishing, POB 1385, Pittsfield, MA 01202.

Interface Designs stopped selling HS-1 interfaces for TS1000'S, but is developing 2068 products.

The Canadian Copy Store is alleged to be at it again — now with pirate copies of UPLOAD. (The 2068 loader commissioned by SYNTAX (Dec. 83) as FIRSTLOADER by David Ornstein, & sold legally on tape (in 40 84) as UPLOAD by E-Z Key, Zebra Systems, Ramex Inti., & E. Arthur Brown.)

COMPARATIVE ROM ATLAS:

FROM ZX SPECTRUM TO 2068

To convert SPECTRUM software to the 2068, you need the location and function of ROM routines in each. You can buy the annotated ROM disassembly from Melbourne House or Zebra Systems. Timex sells the 2068 technical manual.

Our cross-index links the two ROMs.

This atlas lists routines in order of their hex address in the SPECTRUM ROM and provides the hex address for the corresponding 2068 routine. Labels and names for the SPECTRUM routines come from The Complete Spectrum ROM Disassembly by Ian Logan and Frank O'Hara. All labels and names for 2068 functions come from Corcoran and Branigin's Timex 2068 Technical Manual .

To disassemble the TS2068 Home ROM and 8K Extension ROM (EXROM) , you will need a program like HOT Z (Reviewed in SYNTAX May 84). HOT Z has a large names file which you can load along with the program to

provide subroutine names and some labels for the disassembly. HOT Z self-starts in disassembly mode, to display the Home ROM from 0000h.

In order to disassemble or use EXROM routines, you must enable the bank-switching logic, perform the desired task, then de-activate the EXROM. The 8K EXROM overlays the first 8K chunk of the 16K Home ROM.

To illustrate, the following code copies EXROM to RAM at 8 000h, from which you can disassemble or display it.

DI

LD A, 01 OUT (F4 ) , A IN A, (FF)

SET 7, A OUT (FF) , A LD HL ,0000 LD DE ,8000

Headscan (SYNTAX Sep. 84) MC is an example of EXROM use. If you want to change the header storage location in RAM, change LD IX,FA3C to , say, LD IX, 8000.

Finally, a note concerning the cassette routines of the 2068. All are located in the EXROM, but use subroutines and RST's in the Home ROM. When a call to the Home ROM or RST occurs, bank switching must take place. This adds code to the SPECTRUM documented by Logan.

Corresponding to every CALL or RST in SPECTRUM cassette routines, you find, in the TS2068 EXROM, a 23-byte code segment which starts with PUSH IX and ends with POP IX. This code preserves and sets up registers and calls the service routine at 0F99h in the EXROM. The service routine transfers the calls to the bank switching code in 2 068 RAM, which in turn completes the call to the Home ROM.

N. A. Pashtoon, Port Jefferson, NY

uD ^rAY)\0V)

LDIR

XOR A

OUT (FF) , A OUT (F4 ) , A El RET

3

Closeout of old stock— NOT QUICKLOAD— tapes unlabeled, manuals photo¬ copied. Originally priced from $10-40. $8 ea, $21/3, $25/5 PPD.

GULP Run for your life, pursued by the hungry ogre. I

Everybody’s favorite game of maze pursuit and counterpur¬ suit. Try to escape from the relentless ogre through five dif¬ ferent maze formats. At the same time, accumulate points as you gulp everything in your path.

The more you gulp the angrier your pursuer gets and the faster he chases you. Nine game speeds and nine levels of difficulty let you set the pace, from moderate to frantic! Quick reflexes are a must! Caution though, highly addictive. Hardware requirement — 16K.

SPACE INTRUDERS Play the world famous arcade game!

The intruders are coming! 40 alien ships in each squadron! You must defend your position with the three laser guns under your command. There’s no time to rest. After you defeat one squadron, another will follow, just as determined to land.

Four bases protect you, but disintegrate under the constant bombardment of the intruders. Action speeds up as the game progresses. The full score is displayed on the screen. For a change of pace, you can set the automatic option and watch the machine play itself. Hardware requirement — 16K.

STOCK MARKET Are you a bull or a bear? Find out in a continually fluctuating market with up to four players. You could make a bundle or lose your shirt!

The ZX81 stock market is no place for the faint-hearted. Prices of shares change continuously and randomly, and you have only a short time to decide whether to buy, sell, or pass.

“Buy low and sell high” is the object, but don’t let the value of your portfolio drop to zero. You’re out of luck — and out of the game — once you’ve lost your “stake.” Fast, enter¬ taining, educational, and enlightening. Hardware require¬ ment — 16K.

TEXT EDITOR A sophisticated word processor for an unbeatable price! The program includes a text editor and a formatter/printer. Unlike some word processors, training time on TEXT is minimal; an inexperienced operator can be producing perfect documents in no time at all.

The speed and convenience of on-screen editing and for¬ mat planning is yours with TEXT. Lets you rewrite copy, cor¬ rect errors, check spelling, change numbers — make it perfect — before you print your document. The format¬ ter/printer justifies it and formats according to commands. Hardware requirement — 16K.

STATISTICS Tired of doing math by hand? Here are three programs for computing statistics rapidly and accurately.

There are three programs on the cassette. Program 1 has three parts: (1) Statistics — Calculates the current mean and the standard deviation after each value is entered. (2) Regression — calculates the current mean and the stan¬ dard deviation of the X and Y values and the intercept and slope of the regression line. (3) Trend — calculates the cur¬ rent mean and standard deviation of the X and Y values and the intercept and slope trend lines. Program 2 enables you to perform a Chi Squared Text, and Program 3, Graphs plot, plots a graph of data entered from the keyboard. Hardware requirement — IK.

ORDER FROM SYNTAX

ORDER FROM SYNTAX

© 1984

SPECTRUM	TS	2068	SPECTRUM	TS	2068
LABEL,	ROM	ROM	LABEL,	LABEL,	ROM	ROM	LABEL,
NAME	Addr	Addr	NAME	NAME	Addr	Addr	NAME
START	OOOO	0000	PLUGIN	CL-ATR	0E89	09C3
ERROR-1	0008	0008		CL-ADDR	0E9B	09D6
PRINT -A-l	0010	0010	WRCH	COPY	OEAC	0A02	K-DUMP
GET-CHAR	0018	0018		COPY-BUFF	OECD	0A2 3	DUMP PR
NEXT-CHAR	0020	0020		CLEAR-PRB	OEDF	0A3 5	CLPR
FP-CALC	0028	0028		COPY-LINE	0EF4	0A4A	PRSCAN
BC-SPACES	0030	0030		EDITOR	OF 2C	0A82	EDIT-K
MASK-INT	0038	0030		ADD-CHAR	0F8 1	0AE7	INSA
	004F	004F	PHLAF	ED-EDIT	0FA9	OBI 2
ERROR-2	0053	0053		ED-DOWN	OFF 3	OB 5 9
ERROR-3	0055	0055	LE 3	ED-LEFT	1007	0B6B
RESET	0066	0066		ED-RIGHT	100C	0B73
NO-RESET	0070	0070		ED-DELETE	1015	0B7B	DELSYM
CH-ADD+1	0074	0074	NEXTCH	ED-ENTER	1024	0B8 A
TEMP-PTR1	0077	0077	NC-HL	ED-EDGE	1031	0B97
TEMP-PTR2	0078	0078	TC-HL	ED-UP	1059	OBBF
SKIP-OVER	007D	007D		ED-SYMBOL	1076	OBDC
TOKENS	0095	0098	TOKENS	ED-ERROR	1 07F	0BE9
KEYTBL	0227	0245		CLEAR-SP	1097	OBFE	DEL-K
KEY-SCAN	028E	02B0	K-SCAN	KEY-INPUT	1 0A8	OCOE	IN - K
KEYBOARD	02BF	02E1	UPD-K	ED-COPY	HID	0C83	ECHO
K-REPEAT	0310	0336		1 REMOVE-FP	11A7	ODOD	DESLUG
K-TEST	031E	035C	K-BASE	NEW	1 1B7	0D1D	K-NEW
K-DECODE	0333	0371	CHCODE	START/NEW	11CB	0D31	IN IT
BEEPER	03B5	03F 3	PARP	RAM-SET	1219	0D7F	NEW
BEEP	03F8	0436	BEEP	MAIN-EXEC	1 2A2	0E28
PRINT-OUT	09F 4	0500	SEND-TV	MAIN-1	12A9	0E2F	LED18
PO-BACK- 1	0A2 3	0 5 3 A	P-LFT	MAIN-4	1303	0ED8	LED4
PO-RIGHT	OA 3D	0554	P-RT	REPORT-MSG	1391	0F65
PO-ENTER	0A4F	0566	P-NL	MAIN-ADD	155D	1158
PO-COMMA	0A5F	0576		CH-INFO	1 5AF	11AA	CHINIT
PO-QUEST	OA 69	0580		INIT-STR	15C6	11C1	SMINIT
PO-TV-2	0A6D	0584		WAIT-KEY	1 5D4	1 1CF	RDCH
	0A9B	0 5B2	SET-AT	INPUT-AD	1 5E6	1 1E1	INCH
PO-ABLE	0AD9	05F0		OUT-CODE	1 5EF	11EA	PUTDIG
PO-STORE	OADC	05F 3	STTVCU	PRINT-A-2	15F2	1 1 ED	SENDCH
PO-FETCH	0B03	061 A	LDTVCU	CHAN-OPEN	1601	1230	SELECT
PO-ANY	0B24	063B		REPORT - 0	1 60E	1 2 3D	ERRO
PO-ALL	0B7F	06B4		CHAN-FLAG	1615	1248	SEL-HL
PO-ATTR	OBDB	0710	ATTBYT	CHAN-K	1634	1 29 A
PO-MSG	OCOA	073F	PUTMES	CHAN-s	1642	12A8
PO-SAVE	0C3B	0776	PR - TV 2	CHAN-P	1 64D	1 2B3
PO-SEARCH	OC 41	077C		ONE-SPACE	1652	12B8	INS1
PO-SCR	OC 5 5	0790	TVFUL?	MAKE-ROOM	1655	1 2BB	INSERT
REPORT-5	0C8 6	07C 1	ERR 5	POINTERS	1664	1 2CA	REMGSZ
TEMPS	0D4D	0888	R-ATTS	LINE-ZERO	1 68F	1 31 E
CLS	0D6B	08 A 6	K-CLS	LINE-NO	1695	1324	GET-LN
CLS-LOWER	0D6E	08A9	CLLHS	RESERVE	1 69E	1 3 2D	LCU2
CL-ALL	ODAF	08E A	CLS	SET-MIN	1630	133F	CLEL
CL-SET	0DD9	0914	SET-CUR	SET-WORK	16BF	1 34E	X-CALC
CL-SC-ALL	ODFE	0939	SCRL	REC-EDIT	1 6D4	1363	X-T-HL
CL-LINE	0E^4	097F	CLS-B	SET-STK	16C5	1354	RESET

5

SoftSync — ORDER FROM SYNTAX

tfrITUClK'UIO U.V miss i • m *\ m »»»» fun

GRAPHICS KIT 16K GRAPHICS KIT 16K

PROGRAMMERS TOOLKIT J6K,

V-^SE/fRCM bA'(QEj

• a V ’**• F1P *• ,

Graphics Kit^re Compatible

Programmers

PROGRAMMERS’ AIDS

MOTHERSHIP

3D GRAPHICS FOR YOUR TS1000? When you see yourself peering out of the cockpit of your Starlight Fighter, screaming down the Zarway « ^5^TTi~ryT^Tk^ space corridor towards the ominous MOTHERSHIP,

you won't believe your eyes, because the are so good.

:/ ' The enemy MOTHERSHIP is maneuvering out

^ space preparing to take over your beloved

planet. She's launching an all out attack, sending out wave after wave of drone fighters.

^ They're pouring down the Zarway - all around you

^ - firing deadly lasers. You can maneuver in all

directions to dodge them. Knock off ten and you r get a clear shot at the MOTHERSHIP, if she doesn't

J,~ get you first!

MOTHERSHIP is an original arcade game written in machine code with one or two player choices, three levels of play, on-screen scoring and fast action - like you've never seen before on your

16K $16.95

TS1000/ZX81

RED ALERT

Scramble on board your ship, check the computer for STATUS - The screen says you've got "* plenty of fuel, bombs and missiles.

^ ^ And you're in the air, dodging oncoming aliens

‘ -« who are firing rockets at you, skimming above

E menacing mountains from which rockets are

being fired at you. You can maneuver up and down, shooting the aliens with missiles, five at a time and dropping bombs three at a time on the mountains below.

Destroy a ship for ten points, a fuel dump for 15 ‘H^ri A M[1 points and knock down an enemy missile for five

But watch your fuel rate— if 'empty' appears on you're in for it. And if you lose all three of your ships, you're finished, g machine code graphics game is rated as the closest Timex 1000 program toan

16K $14.95

Licensed from Paul Holmes

MACHINE CODE TEST TOOL

We brought some of these MACHINE CODE TEST TOOLS back from England for our

^ programs.

The 32 page book contains practical examples and 'hands on' experience of using machine code programs, ft also examines the TS1000/ZX81 ROM and how BASIC programs are stored in RAM. A HEX: decimal conversion routine is contained within the program. 16K $19.95

NIGHTGUNNER

You peer into the inky black sky from your v JM J\ position as the tail gunner in a bomber plane,

\« £g " Jb searching for enemy aircraft. Suddenly, from

//$ \ above, a fighter plane swoops down, machine

/ #/ Ar^\x. \ \ gun bullets flaring at you. You swing your tail gun

I / f” \ \ \ into position, line up your sights and fire. "Take

i \ \ \ that, you dusty little hunchback!" you yell with

— . — I — i * I < 1 1 I 1,1 . r-^-j — 1 — satisfaction as the aircraft disappears from the

I yAMnV VDV / / / sky. But such triumphs are short-lived when you

\ JjP^Y^V T gJ&I- / • J play NIGHTGUNNER because there are always

\ ' j more enemy planes coming at you from all

PWLk\ ' L^yLjfLJL. y Wm directions, weaving randomly. With nimble

/ fingers you can quickly maneuver your gun in any djrectj0n ancj f|re But each round gets faster and harder. NIGHTGUNNER also features on-screen scoring, high score and ammunition count as well as bonus points. 16K $14.95

Licensed from Digital Integration

ZX81 is a registered trademark of Sinclair Research Ltd. TS-1000 is a registered trademark of Timex Corp.

ORDER FROM SYNTAX

© 1984

SPECTRUM	TS	2068
LABEL,	ROM	ROM	LABEL,
NAME	Addr	Addr	NAME
INDEXER	1 6DC	136B	SEARCH
		1374	SRCHSC
CLOSE	16E3	1 39F	CLOSE
	1 6EB	13A8	RSTSTR
CLOSE-2	1701	1 3BE	CLCHAN
OPEN	1736	1 42A	OPEN
OPEN-1	1756	1 45E
OPEN-2	1 75D	1465	OPCHAN
CAT-ETC.	1793	2 5C8	CAT
AUTO-LIST	1795	1 4E1	LIST
LLIST	17F5	1541	K-LLST
LIST	17F9	1545	K-LIST
	1860	1 5 AC	LPO
OUT-LINE	1855	1 5A1	PUT-SR?
0UT-LINE2	187D	1 5C9	PUT
NUMBER	18B6	1602
OUT-FLASH	1 8C1	1 60D	FLASHA
OUT-CURS	1 8E1	1 62D	PR-CUR
LN-FETCH	1 90F	1 65B	NEXT-L
LN-STORE	1 91 C	1668	DE-HL
0UT-SP2	1925	1671
LINE- ADDR	196E	1 6D6	FIND-L
CP-LINES	1980	1 6E8	CP-BC
	1988	1 6F0	SUBLIN
EACH-STMT	1 98B	1 6F3	SU3LN1
NEXT-ONE	1 9B8	1720	RECLEN
DIFFER	1 9DD	1745
RECLAIM-1	19E5	1 74D	DEL-DE
RECLAIM-2	1 9E8	1750	DELREC
E-LINE-NO	1 9BF	1768	LINENO
OUT-NUM-1	1A1B	1788	PUT-BC
OUT -NUM-2	1A28	1795	PU-LN
OUT-NUM-3	1 A30	1 79D
LINE-SCAN	1B17	1A2 7	SYNTAX
STMT-LOOP	1 B28	1 A44	LS4
SEPARATOR	1 B6F	1 AB2
STMT-RET	1B76	1 AB9
LINE-RUN	1 B8 A	1 AD8	EXCUTE
LINE-NEW	1 AEC	1 B9E
REM	1 BB2	1 BOO
LINE-END	1 BB3	1 B09
LINE-USE	1 BBF	1B15
NEXT-LINE	1 BD1	1B27
STMT-RET	1B76	1 AB9	ENDSTT
CHECK-END	1 Bee	1 B44	END?
STMT-NEXT	1 BF4	1 B4A	ENDTEM
CLASS-01	1C1F	1B82	TEM1
REPORT-2	1C2E	1 B91	ERR2
VAL-FET-2	1C59	1 BBC	LT22

SPECTRUM	TS	2068
LABEL,	ROM	ROM	LABEL,
NAME	Addr	Addr	NAME
NEXT-2-NUM	1C79	1 BDC	DYADIC
CLASS-06	1 C8 2	1 BE5	TEM6
REPORT-C	1 C8 A	1 BED	SYNERR
CLASS-OA	1 C8C	1 BEF	TEM10
PERMS	1C96	1 BF 9
FETCH-NUM	1 CDE	1C49	OPTNO
USE-ZERO	1 CE6	1 C51	STK-0
STOP	1CEE	1 C 59	STOP
IF	1 CFO	1C5B
FOR	1 D03	1C78	FOR
LOOK-PROG	1D86	1 D28	SKIP
NEXT	1DAB	1 D 5 5	NEXT
READ	1 DEC	1D96	READ
DATA	1E27	1E82	DATA
RESTORE	1 E42	1E9D
RANDOMIZE	1 E4F	1 ED4	RAND
REST-RUN	1E45	1 ECA	RESTBC
CONTINUE	1E5F	1 EE4	CONT
GO TO	1E67	1 EF1	DUMP
OUT	1E7A	1F04
POKE	1E80	1 FOA
TWO-PARAM	1E85	1 FOF
FIND-INTI	1 E94	1F1E	FIX-U1
FIND-INT2	1 E99	1F23	FIX-U
REPORT-B	1F.9F	1F29	ERRB
RUN	1 EA1	1F2E
CLEAR	IE AC	1F3 6	CLEAR
CLEAR-RUN	1 EAF	1F39	CLR-BC
GOSUB	1EED	1 F 99	GO-SUB
TEST-ROOM	1F05	1FBB	CHK-SZ
REPORT-4	1 F 1 5	1FCF	ERR4
RETURN	1 F 2 3	1FD4	RETURN
PAUSE	1 F 3 A	1FEF	PAUSE
BREAK-KEY	1 F 54	2009	BREAK
DEF FN	1 F 60	201D	DEF
* * * *	*■*-**	2128	SOUND
UNSTACK-Z	1FC3	214F
LPRINT	1FC9	2155	K-LPR
PRINT	1FCD	2159	K-PRN
PRINT-2	1 FDF	217E	P-SEQ
PRINT-CR	1 FF 5	2194
PRINT -ITEM1	1FFC	219B
PR-STRING	203C	21 DB
PR-END-Z	2045	21E4
PR-ST-END	2048	21E7	TERM?
PR-POS-1	2 04E	21 ED
STR-ALTER	2070	220F	STRITO
INPUT	2089	222B	INPUT
IN-ITEM-1	20C1	226B	I - SEQ,

7

BOOK REVIEW
Title:	A Practical Guide to Machine Lanauaae Proaramminq on the Timex/Sinclair
Author :	David B. Wood
Pages :	250+ii (Softcover)
Machines :	ZX8 0 & MicroAce w/ 8K ROM ZX/TS (Usable w/ Spectrum and TS2068)
From:	SIRIUSWARE , 6 Turning Mill Lexington, MA 02173
ISBN:	0-926848-00-3
Price :	$14.95 + $1 P&H

I like this book. It's well written, stays on point, applies directly to your ZX/TS, includes operable program listings and lets you learn painlessly.

Using only 16 chapters and 8 appendices, Dave takes you on a guided tour of the Z80 in Sinclair country, distinguishing the CPU properties from the system behavior with clarity and flair. Your tour guide is an expert whose practical experience includes writing the word processor "WORD*" on which this book is written. Appendix 4 contains Dave's assembler, written in BASIC, for you to type in and use to try routines.

Appendix six catalogs the ROM routines into nine functional areas and then provides address, exit and entrance conditions, plus a concise operational description for each.

Other appendices collect wide¬ ly available reference material and organize it for use with this book.

From the following list of chapter titles you get an insight to what's covered:

1 Bridging the Gap

2 Locating Machine Code

3 Software Tools

4 Organization of Memory

5 Finding Your Way Around BASIC

6 Getting at the Variables

7 FAST and SLOW Mode

8 Manipulating Memory Space

9 Aborting

10 Writing to the TV Screen

11 Communication and Passing Parameters

12 Reading the Keyboard

13 Scanning BASIC

14 The Floating Point Calcu¬ lator

15 The INs and OUTs of Tape Read/Write

16 Programming and Debugging Hints

Every chapter contains program listings that do real things — for example read a tape into a space above RAMTOP — that enable you to do something more with your machine. You don't need a lot of knowledge to use these routines, but as you use them you'll find other MC books making more sense. If you already know Z80 code, you'll get the ROM environment and utilities straight.

One of the strongest features of this book is it's accuracy. All routines were re-entered from the galley proofs to make sure they did not contain typos. The assembler listing came directly from Dave's computer and 80-column printer. I found only line 6990 difficult to enter — use shift Q for the quotes enclosing the right parenthesis.

Privately, Dave told SYNTAX that most of the 8K ROM functions exist — using the same code — in the TS2068. Only the display and tape handling differ substantially. He figures about half the book applies to the 2068. By extension, a like fraction should apply to your ZX Spectrum or to the emulators.

COVERED ZX FEEDTHROUGH CONNECTORS

Connector, extender PC bd., cover w side cable exit & screws. $10 ppd

ORDER FROM SYNTAX

8

© 1984

SPECTRUM	TS	2068
LABEL,	ROM	ROM	LABEL,
NAME	Addr	Addr	NAME
IN-ASSIGN	21B9	2363
REPORT-H	21D4	237E	ERRH
IN-CHAN-K	21D6	2380	NOTKB?
CO-TEMP-1	21E1	2 38B
CO-TEMP-2	21E2	2 38C	GR-COL
CO-TEMP-4	21FC	23A6	COLITM
CO-TEMP-7	2234	23DE	COLOUR
CO-CHANGE	226C	2416
CO-TEMP-C	2273	241 D	HIFLSH
BORDER	2294	243E	BORDER
***-*	*•***	24D2	NEWDEV
**-**	****	2 5B9	PASSEM
PIXEL-ADD	22AA	2603	SCRMBL
POINT	22 CB	2624	F-PNT
PLOT	22DC	2635	PLOT
PLOT-SUB	22E3	2 63E	PLOTBC
STK-TO-BC	2 307	2660	GETXY
STK-TO-A	2314	2 66D
CIRCLE	2320	2679	CIRCLE
DRAW	2382	2 6DB	DRAW
CD-PRMS1	247D	2 7D6
DRAW-LINE	24B7	2810	DRAW-L
SCANNING	24FB	2854	EXPRN
SYNTAX-Z	2330	2889	INTPT?
S-ATTR-s	2580	28D7	F-ATTR
S-U-PLUS	2 5AF	2 96D
S-LETTER	26C9	2A8 7
S-FN-SBRN	27BD	2B7B
S-SCREENS-S	2535	288E	F-SCRN
S-RND	25F8	29B6	RND
S-PI	2627	29E 5	F -PI
S-INKEYS	2634	29F2	F-INKEY
FN-SKPOVER	28 A3	2C69	NXT-HL
LOOK-VARS	28B2	2C7 0	FIND-N
stk-f-arg	2951	2D0F
STK-VAR	2996	2D 54	GET-EL
SLICING	2A52	2E1 0	SLICER
STK-ST-0	2AB1	2E6F
STK-STO-1	2AB2	2E70	PSHSTR
STK-STORE	2AB6	2E74	PAEDCB
INT-EXP-1	2ACC	2E8 A
DE, (DE + 1 )	2AEE	2EAC
GET -HL*DE	2AF 4	2EB2
LET	2AFF	2EBD	LET
L-ENTER	2BA6	2F64
L-ADD-S	2BAF	2F6D
L-STRING	2BC 6	2F84
L-FIRST	2BEA	2FA8
STK-FETCH	2BF1	2FAF	POPSTR
DIM	2C02	2FC0	DIM

J5PECTRUM	TS	2068
LABEL,	ROM	ROM	LABEL,
NAME	Addr	Addr	NAME
ALPHANUM	2C88	3046	ALNUM?
ALPHA	2C8D	304B	ALPHA?
DEC-TO-FP	2C9E	3059	STKSUM
NUMERIC	2D1B	30D9	DIGIT?
STK-DIGIT	2D22	30E0
STACK-A	2D28	30E6	STK-A
STACK-BC	2D2B	30E9	STK- BC
INT-TO-FP	2D3B	30F 9	ININT
E-TO-FP	2D4F	3100
INT-FETCH	2D7F	31 3D	LDDE
P-INT-STO	2D8C	314A	STDE-U
INT-STORE	2D8E	314C	STDE-S
FP-TO-BC	2DA2	3160	FP2BC
LOG ( 2tA )	2DC1	317F
FP-TO-A	2DD5	3193	FP2A
PRINT-FP	2DE3	31A1	OUTPUT
CA=1 0*A+C	2F8B	334A
PREP-ADD	2F9B	335A
FETCH-TWO	2FBA	3379	SUMSLD
SHIFT-FP	2Fdd	339C	SHIFT
ADD-BACK	3004	3 3C3
SUBTRACT	300F	3 3CE	SUB
addition	3014	3 3D3	ADD
HL=HL*DE	30A9	3468	MULT
PREP-M/D	30C0	347F
multiply	30CA	3489
REPORT-6	31 AD	3 56C	ERR6
division	31 AF	356E	DIVIDE
truncate	3214	3 5D3	TRUNC
RE-ST-TWO	3293	3052
multiply	30CA	3489	TIMES
RE-STACK	3297	3656	FLOAT
FP calculator start:
	32C 5	3684
CALCULATE	335B	3 71 A	CTRO
f p-calc-2	3 3A2	3761
TEST- 5-SP	3 3a 9	3768	ROOM?
STACK-NUM	3334	3773	STK-M
MOVE-FP	3 3C0	377F	RAMNO
STK- DATA	33C6	3785
SKIP-CONS	33F7	3 7B6
LOC-MEM	3406	37C 5	ARRAY
get-mem-0	340F	37CF
s tk-zer o	341 B	37DA
s t -mem - 0	342D	3 7EC
EXCHANGE	343C	37FB
series-06'	346A	3829
NEGATE	346E	382D	NEGATE
sgn	3492	3851
in	34 A 5	3864

9

BOOK REVIEW

Product : Machines : Price : From:

Key-finder Card

TS2068

$1.95

Banta Software 8088 Highwood Way Orangevale, CA 95662 916/722-4895

Some things turn out more use¬ ful than you would at first think-- this card is one of them. When I first got it, I stuck it on the 2068 test setup — what harm could it do? But I shift computers all day using the entire Sinclair family plus Osbornes and TRS-80's. I save a few minutes each time I use the 2068 by finding functions without scanning the whole keyboard twice.

Banta's concept is simple — a multi-column reference card with functions listed alphabetically, followed by the cursor necessary, then the key combination that pro¬ duces the function.

Execution of the concept is adequate, it's printed on cardboard and designed to fit above the 2068 keyboard. The type is dot-matrix, black on matte gray. Consistent l.inework on the 7 sections of the table keep you from losing your place. A score mark helps you fold the upper edge to position the card

This product is so simple, you could make one yourself. What you could not do is make it for $1.95!

VAL$ ON YOUR 2068

To see what VAL$ does, enter:

RUN the program and see on the display what each function does.

You can use this to print both your formula and its number value from a string variable. Succinctly put, VAL$ gives you the string that VAL evaluates, the right-hand side of the equation for A$, by returning some steps earlier. If you have access to a Spectrum manual, you'll find its explanation clearer than that offered by Timex.

This feature is one of the subtleties implied by the statement "Sinclair machines always call the expression evaluator", and plays a role in the sometimes odd report codes that result from failures at intermediate steps.

SINCLAIR SOFTWARE FOR ZX/TS

We found a relative handful of the original Sinclair tapes in an old New England mill. All new, in good shape. If you don't have these fun and useful programs, better move quickly. NOT AVAILABLE IN STORES. These are classic programs for ZX/TS computers. All use 16K RAM.

Complete your collection, pick up what you need now. Just these ten titles still available:

VU-CALC

VU-FILE

COUPON MANAGER STOCK OPTION ANALYZER CHESS (WITH CLOCK.) j CUBE GAME >

BACKGAMMON & DICE FLIGHT SIMULATOR SUPER MATH MIXED GAME BAG

Now you can buy these for $9 each, any 3 for $25. Save BIG, buy 6, get all ten — FOUR FREE PROGRAMS — just $50. Free offer limited to first 180 customers — DON'T DELAY — ORDER NOW FROM SYNTAX.

ZXK still available — get a spare lO

© 1984

TIMEX EXROM

SPECTRUM	TS	2068	SPECTRUM	TS	2068
LABEL,	ROM	ROM	LABEL,	LABEL,	ROM	ROM	LABEL,
NAME	Ad dr	Addr	NAME	NAME	Addr	Addr	NAME
peek	34AC	386B		SA-BYTES	04C2	0068	W-TAPE
usr-no	34B3	3872		SA-LEADER	04D8	007E
usr-$	34BC	38D7		SA-LOOP	04FE	00A4
TEST-ZERO	34E9	3904	TESTO	SA-BIT-2	0511	00B7
GREATER-0	34F 9	3914		SA-8-BITS	0525	OOCB
NOT	3501	391 C		SA/LD-RET	053F	00E5	W-BORD
less-0	3506	3921		REPORT-D	0552	OOFS
FP- 0/1	3 50B	3926	STBOOL	LD-BYTES	0556	OOF C	R-TAPE
or	351 B	3936		LD-BREAK	056B	0111
no-&-no	3 524	393F		LD-LEADER	0580	0126
str-&-no	3 52D	3948		LD-SYNC	058F	0135
no-1 -eql	3 53B	3956		LD-8-BITS	05CA	0170
s trs-add	3 59C	39B7		LD-EDGE- 2	05E3	0189	RD-BIT
STK-PNTRS	3 5BF	3 9DD		LD-EDGE-1	05E7	018D	RD-EDGE
chr $	3 5C9	39E4		LD-SAMPLE	05ED	0193
val -&- val $	3 5DE	39F9		SAVE-ETC	0605	01 AB	SLVM
s tr$	361F	3A3A		REPORT-F	0642	0228
read - in	3645	3A60		SA-NAME	064B	0231
code	3669	3 A84		SA-DATA	0652	0238
len	3674	3A8F		SA-V-OLD	0672	029A
dec- jr-nz	3 67A	3A95		sa-v-new	0685	02A9
DUMP	3686	3AA1		SA-SCR $	06A0	02F2
jump- true	368F	3AAA		SA-CODE	06C3	032E
end -calc	369B	3AB 6		SA-LINE	0716	0447
n -mod -m	36A0	3ABB	INTDIV	SA-ALL	075A	04C9
-#--***	****	3AC 5	LDMES	LD-LOOK-H	0767	04D6
in t	36AF	3ACA	INT	LD-NAME	07A6	053D
EXP	36C4	3ADF	EXP	VR-CONTROL	07CB	058F	VERIFY
1 n	3713	3B2E		LD-BLOCK	0802	05C6
ge t -ar g t	3783	3B9E	ANGLE	LD-CONTROL	0808	05CC	LOAD
cos	37AA	3BC5	COS	LD-DATA	082E	0606
sin	37B5	3BD0	SIN	LD-PROG	0873	0673
tan	3 7DA	3BF 5	TAN	ME-CONTROL	08B6	06E5	MERGE
a tn	3 7E2	3BFD	ATN	ME-OLD-VP	08F 9	0752
asn	3833	3C4E	ASN	ME-ENTER	092C	0799
acs	3843	3C5E	ACS	ME-ENT-1	093E	07CF
sqr	384A	3C65	ROOT	ME-ENT-3	0958	0825
to-power	38 51	3C6C	TO-THE	SA-CONTROL	0970	0851	SAVE
	*•#•-**	3C89	SEPRMT	SA-l-SEC	0991	089A
(note:SEPRMT are	1 tape	msgs . )
'spare 1	386E	3CDC	'EMPTY'	The balance	or tXKUM contains
charctr-set	3D00	3D00	CH-SET	the hunction Dispatcher	, Bank
				Switching Lode ,	and various
The Spectrurr	} does	. not	support	other routines ,	which	does not
the followin	i g r o i j	1 1 ines	.	have counterparts	in the bpectrun
* ** *	** *-*	1 7B5	AROS	A total of	approximately 2K Bytes
** **		1 7CF	GETAL	of EXROM is	unused .
	* ***	1 7E A	AR-LN
		1 7FF	AR-NXT
		1 8C6	AAROS

11

TOWERS OF HANOI — 8K/16K & 2068

This program demonstrates the use and manipulation of a 3-dimen¬ sional string array, N$(R,C,9), by tracking occupancy with a numeric array, P(R,C). The program runs in slow mode; you can see blocks move.

Both ZX/TS and TS2068 versions operate in the same way, but the following analysis refers to line numbers in the ZX/TS program. You can find the equivalent lines in the color version, which has added commands to enhance the colors and different graphics that use T32068 color to advantage.

Line 60 reserves a grid of 230 spaces (P) , (10 rows (R) of 23

columns (C) ) . If P=l, the position is occupied. P=0 means vacant. In N$, position R,C can be occupied by nine-character strings, shown by the third dimension of N$, (line 40). Five strings (A$ — the blocks) will be used (line 5 0) and designated 1- 5 (lines 70-110) .

Lines 130-200 build, and 270- 320 label, three platforms. Our first platform is topped with five blocks (lines 210-240). The others remain empty, for now.

FROM loop F (in lines 450-580) removes the top block (lines 490- 510) (P=l) and empties the space by

resetting variable P=0.

TO loop T (lines 590-710) seeks an empty space (P=0) from the bottom up, deposits the block there (line 650) and makes P-1 at the new position (line 680).

S (line 430) tabulates moves. You need at least 31. How few can you use to move all the blocks?

Enter the program listing as shown, then SAVE by using GOTO 820 for the ZX/TS version or GOTO 760 on your TS2068.

When program displays, press any key to make the game start.

Exit the program with BREAK. Re¬ start with RUN.

W. C. Andrews, San Anselmo, CA

SOLUTION

MOVE PIECE FROM TO

1113

2 2 12

3 13 2

4 3 13

5 12 1

6 2 2 3

7 113

8 4 12

9 13 2

10 2 3 1

11 1 2 1

12 3 3 2

13 1 1 3

14 2 1 2

15 1 3 2

16 5 1 3

17 1 2 1

18 2 2 3

19 1 1 3

20 3 2 1

21 1 3 2

22 2 3 1

23 1 2 1

24 4 2 3

25 1 1 3

26 2 1 2

27 1 3 2

28 3 1 3

29 1 2 1

30 3 2 3

31 1 1 3 /

This program tests your moves to see if you placed a larger piece atop a smaller one. If so, you are chided and told to move it back.

If you ignore the instruction, you can still cheat. In addition, it fiendishly refuses to let you put a piece back on the pile you took it from (line 440). From 1 to 3, 5 times, lets you win in 5 moves, despite the fact that the tower is completely inverted.

12

SoftSync — ORDER FROM SYNTAX

REMEMBER — SYNTAX CAN GET THESE BOOKS FOR YOU

Timex-Sinclair 2068:

Beginner/Intermediate Guide $9.95

Intermediate/Advanced Guide 9.95

ZX/TS:

ZX-81 BASIC Book 12.95

Timex-Sinclair 1000/ZX81 User's Handbook 5.95 Timex-Sinclair BASIC Primer W/ Graphics 9.95 ZX81 , TS1 000 Home Computer Book 8.00

Crash Course in Microcomputers 2d 21.95

Please add $2 P&H for EACH book ordered

SPACE COMMANDO

The amalgamation of friendly planets has commissioned you to infiltrate Zircon 12, a space colony overtaken by the evil Dr. labor and his renegade androids. Here the dreaded Dr. Zabar established a home base and research facility for his twisted experiments using the native populace of Zircon 12 as guinea pigs.

Your quest is to infiltrate Zircon 12 and defeat the forces of evil so that the space fleet can land.

16K $14.95

SHARK'S TREASURE

You are diving in shark infested waters in the middle of the Indian Ocean where the last known pirate ship lies wrecked on the bottom of the sea. The perils of these waters have preserved the fabulous* riches that were the pirates' bounty over 100 years ago. Find the hidden treasure and escape unscathed from the jaws of death.

16K $14.95

SoftSync — ORDER FROM SYNTAX

STRATEGY

SUPERCHESS

SUPERCHESS is probably the most advanced chess game available for the ZX81 and TS1000 computers - so good you'll probably start to talk to it. SUPERCHESS is an extraordinary player and has many features not found in any other computer chess game. Some of the features include:

• Ten levels of play. Higher levels are designed for extended games and problem solving. • Select tactical or positional evaluation. • ANALYZE feature allows you to set up and/or change a position by adding and removing pieces. • All legal moves including castling and pawn capture en passant are allowed. • SUPERCHESS has a store of standard openings. • Excellent graphic board display includes a coordinate system and standard algebraic chess notation. • Up to 15 previous moves displayed. • The computer will recommend moves if you're stuck. • SELF-PLAY allows you to watch SUPERCHESS play against itself. • Detailed documentation and playing instructions are included.

Licensed from CP Software ^ ^ $1 9 95

MAZOGS

MAZOGS is one of the cleverest, most graphically elaborate games we've ever seen for the Timex 1000 and Sinclair ZX81. You enter a complex maze which contains a glittering and fabulous treasure. But also inside the maze is a host of fearsome MAZOGS.

The program draws a different maze for each mission. You can get an overview of the whole maze, but while you're playing the game you see only the corridors which you will be running through (you control a lifelike character that actually runs through the maze). As you search for the treasure, you pick up a sword to fight off the furious MAZOGS and find prisoners (they have dark, flashing eyes) to guide you to the treasure.

MAZOGS has three levels of play, including the adventurous level of Maniac Mobile Mazogs. MAZOGS, the only graphically illustrated adventure available fortheTS1000/ZX81, is so much fun you'll find it hard to drag yourself away from it. $19 95

Licensed from Bug Byte

ROAD TO RICHES

One minute you're bankrolling a big-time, splashy Broadway show, the next minute you're on a one-way trip to Palookaville.

jjjp — «s*i That's the world of high rolling, high finance and

Y \ that's ROAD TO RICHES, a game in which you're

^ an instant millionaire and you compete to build

MJ& your financial empire.

*■■■■ g— 1: Up to four players make investments in all kinds of

The computer carefully weighs each investment and your chances for winning or losing. Like real life, low risk usually medns (but not always) low yield while high risk can mean big bucks or bust. How's your financial prowess when it comes to the risk and skill of a true entrepreneur? ROAD TO RICHES simulates the fast-moving financial world in an entertaining and educational way.

16K $14.95

Most of the error-checking in this program can be defeated or ignored easily. But the program does a good job for an honest, cooperative user.

Many programs offer this style of writing to wor.k_*. You should now add error traps so that the program * can not fail. Be creative in your testing — try moving from 1 to 2, then from 2 to 1 — this should not win the game! Also try from 1 to 2, 2 to 3 , 2 to 3... Hmmmm !

See if you can find ways to make these programs use less array space without changing the 10 by 23 part of the DIM statements. Does N$ need 9-character strings? Does P need to be a number (7 bytes for each location) ?

Can you make the anti-cheating loop put the piece back and charge you two moves? — KO

Each issue brings you 32 pages o-f usable in-formation, program listings, product reviews, programming articles, harc^are projects, and applications -for your computer. T-S HORIZONS ■features nationally known authors like Paul Hunter, Gordon Young, and others. The price is ONLY $15.00 -for a -full year (12 issues). AND -for a limited time only, new subscribers will receive our special telecommunications issue (#7, see below) *FREE* with their subscription.

IN T-S HORIZONS * 7 Byte Back Modem Review 2068 Programming Tips How a Comp i 1 er Works Tel ecommumi cations ■for Beginners Book & Game Reviews Rotating Globe Routine Articles By G. Young and Paul Hunter Sinclair Into. Network TS-1000 Power Supply -and more ' ' !

HORIZONS

$15 tor _1 2_mon_t hj_ y_ i s su e_s ._$2 .0 0_ samp 1 e or_back ^ssu^es^ _

Enclose $15 (US) tor 12-issut ,

subscription, plus *FREE* back NAME -

issue (while supplies last).

$21 Canada, $25 other toreign. ADDRESS _

Extra back i ssue/sampl e i $2.00

CITY _ _ _

SEND TO: T-S HORIZONS

2002 Summit St STATE, Z1P_ _

PORTSMOUTH, OH 45662

T-S Hariunx

Time* Compute* US**

TS-206S IS- 1000/1511

PR0CR A MS BANK SWITCHING 4

TIPS “WORN "• CONCLUDED

REVIEWS POWER SUPPLY?

Ri«m A Gossip Nf Colw _

T-S

Enter ZX/TS Graphics as follows:

70 3 spaces graphic eight inverse one graphic five 3 spaces 80 3 spaces inverse space

inverse two inverse space 3 spaces

90 2 spaces 2 inverse spaces

inverse three 2 inverse spaces 2 spaces

100 space 3 inverse spaces inverse four 3 inverse spaces space 110 4 inverse spaces inverse five 4 inverse spaces 160 graphic eight 7 graphic H's graphic five

170 graphic eight 3 graphic H's...

3 graphic H's graphic five 180 graphic eight 7 graphic F's graphic five 930 17 graphic sixes 940 inver se (space TOWERS space OF space HANOI space)

950 17 graphic sevens 990 5 space inverse * space... space inverse *... 5 space * inverse (space NO space NO space) * space

2068 First, remember the light part of the key symbol means INK. Also, we use SS to mean SYMBL SHIFT — hit the black & 3 keys in graphics mode to get "SS graphic three."

70 3 SS graphic eights 1 SS graphic five...l SS graphic five 3 SS graphic eights 80 3 SS graphic eights space...

space 3 SS graphic eights 90 2 SS graphic eights 2 spaces..

2 spaces 2 SS graphic eights 100 SS graphic eight 3 spaces...

3 spaces SS graphic eight 110 4 spaces... 4 spaces

160 SS graphic eight 7 graphic threes SS graphic eight 170 SS graphic eight 3 spaces...

3 spaces SS graphic eight 180 SS graphic eight 7 SS graphic threes SS graphic eight 930 17 SS graphic three 940 inverse (space TOWERS space OF space HANOI space)

990 17 graphic three

14

ogas

x&hr*

tVSBKfo ss

MATRIX

PLANNER

An all-purpose electronic i

spreadsheet i

$22 95 J

any 3 assorted

L>t! 1

,>****$

INVENTORY FORECASTING SLIDE SHOW CRITICAL NUMERIC

kni2e A useful word CONTROL GRAPHS

\ processing Two ways to Analyzes

m/ program keep track of growth

$19.95 inventories trends and

M $22.95 plots graphs

m $22.95

SCREEN KIT

Routines to

Creates and PATH Solves math ^BrtcutM Routines

runs video Gets complex formulas and ^Bmmand®r enhance

display shows scheduling draws graphs ^Brogramm* screen

$22.95 under control $24.95 ^F$19 95 ® displays

$19.95 Jr « 21 9 95

$39

plus

shipping

SPECIAL

SPECI AL> SPECIAL

SPECIAL

MW-100 PLAIN PAPER--15 ROLLS — FOR JUST $10 <SPECIAL

plus shipping SPECIAL

GAME SOFTWARE SPECIAL :

Choose any combination of three from the following nine programs - Retail Value up to $51.85

GULP LABYRINTH PILOT GRAPHIC G

Gobble your Can you find Cockpit A challenge

way through your way controls 18-hole

mazes, chased through that teach you golf course

by ogres 3-D corridors’ howto $g 95

$15.95 $15.95 navigate

219 95

any 3 assorted

*

GRAPHIC GOLF CROSSWORD ANAGRAMS WORD TEST MULTIPLE

A challenging Create and play Try to put the All kinds of CHOICE

your own scrambled questioi

crosswords words answer

$15.95 back in order $15.95

$15.95

WORD TEST MULTIPLE COSMOS

All kinds of CHOICE Hyperspace

question and Can you pick laser battles

answer tests the correct among the

$15.95 answer’ stars!

$15.95 $15.95

$29

$5 SHIPPING CHARGE PER ORDER TO ONE ADDRESS

plus

shipping

Phone and written orders gladly accepted. Call or write ; The Harvard Group, Dept. SX

Money Orders, VISA, MC or checks. D* Box 457

™ M „z/. Harvard, MA 01451

Phone Number - 617-456-3661

SoftSync — ORDER FROM SYNTAX

FINANCIAL

THE ADVANCED

**«>* BUDGET MANAGED

%mm ■■ ■ DWL/N,CI n"«r'***v*CK

THE ADVANCED BUDGET MANAGER is the

** ultimate financial program for the Timex 1000

computer because it combines a financial data

mm'l base with a forecasting program.

" You can store a year's worth of projected and

iMUlifflCnD I actual expense and income for comparison and

lFLwWJl||li®05 IRS!? record keeping as well as access this financial

* data in many useful ways.

^ ^ ^ 3? 5* There are six income and 24 expense categories,

- all user defined. Choose from the menu to input ” or review data, analyze income/expense (pro¬

jected and actual) by month, category or total. This management program, for both home and business applications, is easy to operate and includes clear and comprehensive instructions. Making entries is simple, there is a built-in SAVE feature allowing you to update your files and PRINT routine for hard copy. 16K 95

ISKBi . . ,mm:r .. stock MABKET

CALCULATOR

Iff ■KilWL _ _

IH1B

THE STOCK* MARKET CALCl

If you are currently an investor in the stock market or thinking of investing, THE STOCK MARKET CALCULATOR will be a valuable aid to you. Detailed instructions will take a novice, step by step through the process, while also offering the more experienced investor a comprehensive worksheet. STOCK MARKET CALCULATOR, written by an experienced stock market executive, actually contains two useful calculating programs. The first, "MKT 1", consists of three sections: A NET PRICE WORKSHEET which calculates commissions on stock and option investments and provides total costs to buy or net from sale. PROFIT/LOSS calculates commissions, net dollars and profit/loss based on the sale price of a stock or option. A COVERED WRITE WORKSHEET calculates nearly every aspect of buying stock and selling call options.

The second program, "MKT 2", adds a "Write Unwrapper" to the NET PRICE WORKSHEET, which is invaluable to option writing investors.

Both covered writing programs allow you to re-enter any of the variables so you can try different investment alternatives. 16K $^95

PERSONAL

BIORHYTHMS

Ever wonder why some days you feel physically, emotionally or intellectually drained while other days you feel like you're on a winning streak?

According to research, peoples' lives are strongly affected by three cycles starting from birth- Physical, Emotional and Intellectual. These are your Biorhythms and they have both positive and negative characteristics.

By entering your birthdate into the program, BIORHYTHMS will graphically illustrate your monthly cycles so that you can analyze them and take advantage of those days when a cycle is on a positive swing and exercise caution when a cycle is on a negative swing. Be especially careful during critical periods when a cycle crosses from positive to negative. You can also print out your BIORHYTHMS with any ZX81/TS1000 compatible printer. $1495

BIORHYTHMS 16K

2K& IK GAMES

SPACE RAID/TS DESTROYER

These two fast moving graphics games, written in machine code for the unexpanded Ti mex 1 000 come together on one cassette. You'll be amazed at the incredible speed, detail and ingenuity squeezed into these 2K games.

SPACE RAID gives you five laser bases which you can maneuver below a giant hovering space¬ ship containing one big, fearsome alien. Fire away at the soft underbelly, knock out chunks of the ship until you hit the alien where it really hurts - his left foot. Ten levels of play.

Your TS DESTROYER flys out of hyperspace into enemy turf. Waves of enemy warships, missiles and meteors are coming from all directions. You

can shoot and maneuver but you can't outrun the guided missiles. Thirty levels of play. Both

games on one cassette.

2K $14.95

2K GAMES PACK

Six great, graphically illustrated games on one cassette for the unexpanded Timex 1000:

COPTER PATROL - Blow out the enemy defense system and rescue the hostages.

KILLER WHALE - As a hungry whale, you must eat as much as possible before you have to surface for air.

ASTROWALK - Can you reunite yourself with the Mothership or are you destined to float around space forever?

MONSTER MASHER - The Monster is on the loose; you must reach the house before he gets you!

STAR BLASTER - Guide your destroyer ship down the star cluttered galaxy blasting a path to your home. DRAGON SLAYER — Escape the hunter - your reputation as a dragon is at stake!

2K $14.95

THIS MAY BE YOUR LAST CHANCE TO GET THESE

wanted SoftSync Titles for your ZX/TS. The manufacturer wants the warehouse space for a batch of IBM stuff but we begged for one last chance for you to get what you want before an unknown buyer can cart them off. All first- quality, guaranteed good stuff. PAY NO MIND TO THE PRICES IN THE DESCRIPTIONS — YOU PAY LESS! Figure your bargain price: Count all the great SoftSync tapes you want from these pages. Multiply the number of tapes by $10. Now multiply the number of tapes by itself & divide the result by 5. Those are your extra discount dollars! Subtract them (from N*$10) to get your price. FREE P&H in N. America. Offer expires Feb. 85— Limit 16 tapes/order.

SYNTAX is published monthly by a wholly-

owned subsidiary of The Harvard Group.

Syntax ZX80, Inc.

RD 2, Box 457, Harvard, MA 01451.

Telephone 617/456-3661.

Publisher: Editor: Consulting Editor: Technical Consultant:

Kirtland H. Olson Eric K. Olson Ann L. Zevnik Kirtland H. Olson

© Syntax ZX80, Inc., 1984. All rights reserved. Photocopying prohibited. ISSN 0273-2696

OUR POLICY ON CONTRIBUTED MATERIAL

SYNTAX invites you to express opinions related to any Sinclair or Timex com¬ puter or peripheral, or the newsletter. We will print, as space allows, letters discuss¬ ing items of general interest. Of course we reserve the right to edit letters to a suitable length and to refuse publication of any material.

We welcome program listings for all levels of expertise, written in either Sinclair BASIC or Z80 machine code. Programs can be for any fun or useful purpose. We will test run each one before publishing it, but we will not debug programs; please send only workable listings. Ptograms submitted on cassette can be tested more quickly and with less chance of error.

In return for your listing, we will pay you a token fee of $2.00 per program we use. This payment gives us the nonexclusive right to use that program in any form, world wide. This means you can still use it, sell it, or give it away, and so can we.

We will consider submissions of news and hardware or software reviews. Please keep articles short (350-400 words). Again, we reserve the right to edit accepted articles to suitable length. We will pay 7 cents per 6 characters, including spaces and punctuation, for accepted articles.

When you send in articles for possible publication in SYNTAX, please include the following information:

• How to operate the program, including what to input if it does not contain prompts.

• Whether you can run the program over again and how.

• How to exit the program.

• The Syntactic Sum (program published in June 81; send SASE for a free copy).

• What RAM size program requires.

• What ROM program uses (8K, 2068, Spectrum).

• For MC programs, what addresses must change to relocate the code and what ROM calls are used.

We pay for this explanatory text at the same rate as we pay for articles in addi¬ tion to payment for the program itself.

If you want us to return your original program listing or article, please include a self-addressed, stamped envelope. Otherwise, we cannot return submitted material.

DEADSOFT (TM)

Up to now, hardware freaks had all the fun. No more — now software junkies get an even break. SYNTAX offers you broken software to fix or use for parts in your projects.

"At these prices we can't test 'em." But it's the software that's bad — the tapes are fine. High- class stuff by famous authors, but production messed up. Load it, fix it, get working stuff and save big. We'd charge more for educational value, but the boss wants these off the kitchen floor, so out they go — cheap. Buy extras to give smart- mouths who call your ZX/TS a toy or put down your programming skills.

TITLE	FUNCTION	ORIGS
VIDEO PLAN*	SPREADSHEET	39.95
INVENTORY	FILE MANAGER	49.95
VIDEO AD	SLIDE SHOW	24.95
BREAKOUT (MC)	GAME	11.95
COMPUTACALC* * Reviewed in	SPREADSHEET SYNTAX Mar. 8 2	39.95

SPECIFY DEADSOFT (TM) AND NAMES OF PROGRAMS WHEN YOU ORDER.

YOUR PRICE $6/TAPE, $25/5 TAPES PPD

SYNTAX, Harvard, MA 01451-0667 MC/VIS A/AMEX/DINERS /ACCESS/BARCLAYS 617/456-3661

(Cassettes unlabeled and unboxed, manuals copied — Royalties prepaid)

Fill out the coupon below and mail to: SYNTAX, RD 2, Box 457,

□ My check is enclosed. □ Please charge my □ VISA

Make checks Payable to: □ Diner’s Club □ Mastercard

SYNTAX ZX80, Inc. □ American Express □ Access

□ Carte Blanche □ Barclaycard

Account number _

Harvard, M A 01451 1rtrw

/ sx!084

YES! Please send me:

□ The Combination II (13 issues of SYNTAX and SQ

Winter 82-Summer 83) . $58

□ The Catch-up II (SYNTAX Jan. 82-Jan. 84, SQ Winter

82-Summer 83, plus binder) . $77

Exp. date _ Bank number (MC only)

Signature _

Name _

Address _ _

City _ State _ Zip

Phone: Day ( _ ) _ Evening ( _ )

□ My subscription number is: _

□ This is a new subscription

□ THE WORKS II (SYNTAX Nov. 80-Dec. 83, SQ Winter

82-Summer 83, plus 2 binders) . $97

□ 12 issues of SYNTAX . $48

□ 3 issues of Syntax Quarterly (Winter 82-Summer 83) .. $25

□ 1 issue Syntax Quarterly □ Winter 82 i □ Spring 83

□ Summer 83 . $9

□ 1 Binder . $9 □ 1 issue of Syntax . $5

Telephone orders call 617-456-3661

These offers expire 02/28/85 — SUBSCRIBE NOW.

SYNTAX

CLASSIFIEDS

FASTFILE — Best filing program for ZX81/TS1 000/15 00 or money back. See ad last issue or write for more information: Tom E. Cole,

1314 Speight #15, Waco, TX 76706

*TEXTWRITER PLUS 64 WORD PROCESSOR* USES TIMEX 64 COL DISP. W/2 068-FULL EDITING-ANY PRINT WIDTH USING AERCO I/F. $29.95 CC & MANUAL. TS 2 04 0 VERSION SOON. BOB FINGERLE, 39639 EMBARCADERO, FREMONT, CA 94538

TIMESCREEN tm (BASIC) $9.00 Z Creativity and planning aid. X

Routines to enter and rearrange 8 data: 3 screen formats: calendar. 1 TALK 5 tm (BASIC) $9.00 Video communication aid for hand- 1 icapped. Instruc. to extend keys. 6 LLIST-GP tm (BASIC) $5.00 K LLIST & COPY ROUTINES for Tandy

Graphic Printer & Parallel I/F. _ -

VA res. add 4%. Add $1 s&h for one cass.& man.; $.50 ea. addl. From: HAWC tm 4604 Apple Tree Dr

_ Programming _ Alex . . VA 22 310

1984 TAX RETURN HELPER Form 1 04 0 & Sch. A,B,C,D,E. TS2 068 & TS1000 (16K RAM). $18 ($12 for previous buyer s) +$1.5 0 s&h. From KSOFT, 845 Wellner Rd. , Naperville, IL 60540 312/961-1250. Check, Visa&MC

TS-2 068 _ PARALLEL PRINTER INTERFACE

cable-sw-shipping included $89.90 BYTE-BACK Rt3 Leesville SC 29070

INTEGRATED DATA SYSTEMS Specials: $40 TS1000, $25 TS 16K,

$80 TS2 040. P&H $5/ord or $1.50/ RAM. Cheque/VISA/M/C. Catalogue $2 11 Brighton Av Toronto M4M 1P3

**** GAMES FOR THINKING PEOPLE **** For ZX81 or T/S1000, 16K or T/S1500 KARTIK tm A crossword card game for 2-8 players. Words scored across, down or diagonally. Lots of fun, and educational I

TANGLE4 tm A new patented strategy game for 2-4 players. Uses board with hidden random directions of movement revealed by pieces. Will test your ability to think ahead. INTR SPECIAL $15.00 ea . ( r eg. $1 9 . 9 5 ) + 6.5% tax (CA residents) +$2 S/H. Cassette or A&J Micro Drive Wafer. Check or MO to: Willcocks Research Consultants, 6321 W. 78th Place,

Los Angeles, CA 90045.

ROMPAK EPROM SOFTWARE CARTRIDGES Many products available including: ZXPROFILE ,OUICKLOAD ,TEXTWRITER,etC Send SASE for free catalogue ROMPAK 1525 Aviation Blvd. # Alll Redondo Beach CA 90278

PLEASE TELL THESE VENDORS THAT YOU SAW THEIR ADVERTISEMENT IN SYNTAX.

H\RV\RD

GROLP

Bolton Road, Harvard. Mass 01451

First Class

U.S. Postage

PAID

Harvard, MA ) Permit No. 8 01451